Railway-signal.



2 SHEETS-SHEET l.

I NVENTUR ofi w PATENTED FEB. 7, 1905.

F. L. DODGSON.

RAILWAY SIGNAL.

APPLIOATIOH FILED MA]; 27, 1903 PATENTED .FEB. 7, 1905.

P. L. DODGSON.

RAILWAY SIGNAL.

APPLIOATION FILED MAR. 27, 1903.

2 SHEETS-SHEET 2.

llll

WITNEEEES INVENTUR V QMA 615 a. aJz/ozia. AQ, QM.

Patented February *7, 1905,

TINTTED STATES PATENT OFFICE.

FRANK L. DODGSON, OF ROCHESTER, NEIV YORK, ASSIHNOR, RY MESNE ASSIGNMENTS, TO GENERAL RAILWAY SIGNAL COMPANY, OF GATES, NEIV YORK, A CORPORATION OF NEW YORK.

RAILWAY-SIGNAL.

SPECIFICATION forming ps1"; of Letters Patent No. 781,639, dated February 7, 1905.

Application filed March 27,1903. Serial No. 149,842.

Be it known that I. FRANK L. Donesox, citizen of the United States, and a resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Railway-Signals, of which the following-is a specification.

This invention relates to railway-signals.

The object of this invention is to provide a safe means for protecting cars or trains from head-on collisions on single tracks. It is particularly useful on trolley-roads where the use of a continuous track-circuit is impracticz ble or at least not feasible.

What are termed counting devices, or devices for counting in and counting out cars from a block, are already known; but in all such known devices the safety of the system depends exclusively upon the proper operation of the counting device. In other words, if the counting device should fail to count a car as it passes into the block a signal may be given for a car to enter the opposite end of the block, and thus organize an accident. With this invention it is impossible for a car to receive a clear signal to enter a block un til after the counting device has properly performed its function, thereby insuring that the signal which is protecting the car is in the danger position and must remain in that position until the car has passed out of the block,

and thereby counts itself out and resets the apparatus in position to give the signal for another car going in the same or in the opposite direction.

In the drawings, Figure 1 isa diagrammatic view of an embodiment of this invention. Fig. 2 is a top plan view of a counter, and Fig. 3 is av front elevation of a counter.

As one example of this invention, in Fig. I it is shown as applied to a piece of single track or block between two pieces of double track. The cars are supposed to runin the directions indicated by the arrows. trance to and exit from each track connecting with the piece of single track is a section of At or near the eni and is in its extreme upward position a contact or connection between the two lnndmgwire to the terminals of an electromagnet or track-relay 5, 6, T, and 8. .Inseries with each one of these track-wires is placed a track-battery 9 58 11 59. Each of these track-relays controls one contact-point 13, II, 15, and 16, respectively. At each of the entrances to the single track is placed a signal or some other traffic-controlling device IT and 18. Each signal is actuated by a motor or by any other suitable actuating device 19 and 20. Adjacent to each of the signals is placed a counting device 21 and This counting device is shown more in detail in Figs. 2 and 3. It consists of two electron'iagnets 23 and 2%, and 26,) mounted upon a suitable base having armature-arms 2T 28. (29 30,) normally pulled back by springs 3i, and having spring-operated hinged ends 32. These armature-a: as are in each counting device arranged to work in connection with two ratchet-wheels and 3%, having oppositelydirected teeth. The ratchet-teeth and armatures are so arranged that when the armature 27 of the counting-in magnet 23 is lifted the ratchet-wheel 33 is rotated one notch to the right and when the armature 28 of the counting-out magnet 2% is lifted the ratchetwheel 3* is rotated one notch to the left. The pawl-like ends 3). permit the armature-arms to return without affecting the ratchet wheels. The ratchetwheels 33 and 34c are fastened on a shaft 35, and fixed upon the same shaft and turning with it is a disk 36, of insulating material. The edges of this disk may be provided with notches which correspond in spacing to the teeth of the ratchet-wheels. Between two of these notches is a piece of metal or bridge 37,

which when the wheel is in the normal or zero.

, position (shown in Fig. 2) forms a bridge or l l l l l l I insulated track I, 2, 3, and I. Each of the 1 rails of the track at these points are joined by metallic connection between the two springs 38 and 39.

Adjacent to the armature of the electromagnet 23 is a contact-point IO, so adjusted that when the armature is attracted by the magnet posts TI and i2 is made between wires 6i and (55, hereinafter mentioned.

The armature-arm 27 (and 30) has no back contact, and for this purpose an insulatingblock 13 may be attached to it, so as to prevent current from flowing through the arm except when the front contact is made.

Returning to Fig. 1, on each of the signals is a contact-breaker of any suitable form, which is actuated by a movement of the signal-blade. One suitable form may be composed of two stationary contact-springs 43 and 4: 1, so arranged that when the signal is in the normal or danger position a plug 15, carried by the signal-arm, makes the connection between the two springs.

The wiring is as follows: Acommon wire extends along the protected track and is connected to one pole of a battery 51 for each signal. From the battery 51 a wire 52 leads to one pole of the signal-motor 19, and from its other pole a wire 53 leads to the springcontact 39 of the counting device. From the other spring-contact, 38, a wire 54 leads to one of the parts, 43, of the contact-maker on the signal 18. From the other partA Lof the same contact-maker a wire 55 leads to the armature-arm 29 of the counting device 22. A wire 56 leads from the contact-point 10 of the armature-arm 29 to the common wire 57, that is connected to the common line 50. A branch from the wire 52 leads the current of the battery 51 to the armature-arm of the trackrelay 5, so as to connect the battery with the contact 13. From said contact a wire 58 leads to the magnet 25 of the counting device 22 and through it to the common wire 57. The battery 60 has one pole connected to the common line 50, and by a Wire 61 the other pole leads to one terminal of the motor 20 of the signal 18. The other motor-terminal leads by a wire 62 to the contact-spring 39 of the counter-22, and the other contact-spring, 38, of said counter is connected by a wire 63 to one part, 44, of the contact-breaker of the signal 17 From the other part,4t3,of said contact-breaker a wire 6 1 leads to the armature-arm 27 of the counter 21. The contact-point 10 of the counter 21 is connected by a wire 65 with the common wire 66, that is connected to the common line 50. The battery 60 is also connected to the armature-arm of the track-relay 7, and the contact-point 15 is connected by a wire 67 with the magnet 26 of the counter 22 and through said magnet with the common wire 57. The track-relay 6 controls the contact 14, which is connected through the battery 10 with the common wire 57 and through the armature-arm of said relay by a wire 67 to the magnet 23 of the counter 21 and through said magnet to the common Wire 66. The trackrelay 8 controls the contact 16, which is connected, through the battery 12, with the common wire 66 and through the armature-arm "of said relay by a wire 68 to the magnet 24 of the counter 21 and through said magnet to the common Wire 66.

The relays 5 and 6 govern the magnets 24 and 26 and may be called the counting-in relays, and the relays 7 and 8 govern the magnets 23 and 25 and may be called the counting-out relays. the motor-circuit for each signal is controlled by both counting devices and by the position of the other signal and that each motor-circuit is closed by the normal position of its own counting device and by operation of the other signal and of its counting device and is opened by the resetting or countingout operation of its own counting device to the normal position. In the embodiment of the invention shown the counter is a step-bystep device having a normal or zero position and is adapted to be operated in one direction to count the presence of a car on a track-section when a related track instrument is operated thereby and to annul such count when the car is on another track-section and the related track instrument is operated thereby.

Suppose a train to approach the signal 17. When the wheels are on the insulated section 1, the circuit through the battery 9 and relay 5 is completed, an axle and pair of the wheels of the train forming a connection between the two rails of the track, and the armature of relay 5 is lifted, making the contact 13. Current then flows from the battery 51 through the wire 58 to the magnet 25 of the counter 22 and through it to the common wire 57, and thus back to the opposite side of the battery 51, making a complete circuit. The armature of the magnet 25 is lifted and the insulated disk 36 is rotated one space to the right. This breaks the contact between the springs 38 and 39 of the counter 22, but makes the contact 40. Going back now to battery 51, current will flow through the wire 52, the motor 19 of the signal 17, and wire 53 to the contact-spring 39 of the counter 21, and as the insulated disk 36 of this counter is in the Zero position contact is made from the spring 39 to the spring 38. Current therefore flows through the wire 54: to the signal 18 and to the contact-spring 43 thereof and, as the signal is in the danger position, through the plug45 to the contact-spring 1 1, then through the wire 55 to the contact-point 10 of the contact 22 and as this contact is made through the wire 56 to the common wire 57 and to the opposite side of the battery 51, thus making a complete circuit. The motor 19 of the signal 17 is therefore put in operation and the signal is pulled to the clear position and the car proceeds. When the car leaves the track-circuit 1, the circuit through the relay-magnet 5. is broken, the armature falls, and the contact 13 is broken. This breaks the circuit through the magnet 25 of the counter 22, the armature 29 falls, and the contact 10 is broken. This breaks the circuit through the signal-motor 19 and the counter-weighted signal 17 moves by gravity to danger. If asecond car ap- It will be seen that r the right.

preaches the signal 17, the same set of circuits are made and in the same Way that is, the circuit through relay is made closing the contact 13, closing the circuit of the magnet 25 of counter 22, and rotates its insulated disk 36 one more notch to the right, and while the armature 29 is up the contact 11) is made, and the circuit through the motor 19 is completed, so that the signal 17 is pulled to the clear position, and when the car leaves the track-circuit 1 the same'circuits are broken when the first car left the section and the signal 17 is returned to danger. If a third car passes into the block over the section 1, the same operations would occur and the counter 22- would be rotated still another notch that is, the counter for every car passing into the section 1 from the left is rotated one notch in one directiontoward As the car leaves the single-track section and passes over the track-circuit 3 the armature of the relay 7 is raised and the contact is made. Current then flows from the battery 60, through the contact 15 and wire 67, to the magnet 26 of the counter 22 and through the said magnet to the common wire 57 and back to the opposite sideof the battery 60 from which it started. This circuit is therefore completed and the armature of the magnet 26 is raised. This rotates the counter 22 one notch in the other direction --to the leftand as the car passes off the section 3 the circuit through the relay 7 is broken, its armature drops, and the circuit at 15 is opened. Consequently the circuit through magnet 26 is broken and its armature returns to the normal back position. The second car passing over the section 3 would repeat this latter operation and rotate the counter 22 one more notch to the left.

Suppose now that while there is one car in the piece of single track and is traveling toward the right a car approaches the signal 18 from the right. \Vhen it comes to the trackcircuit 2, the circuit through the relay 6 is completed and the contact 1% is made. Current now fiows from the battery 10 through the contact-point 11 and wire 67, through the magnet 23 of the counter 21, then through the wires 66, 50, and 57 back to the opposite side of the battery 10. This circuit is therefore completed and the armature 27 of the magnet 23 is lifted and the counter 21 is rotated one notch to the right. The signal-circuit for the signal 17 starts from the battery 60, through the wire 61, to the motor 20 of signal 18 and through the wire 62 to the contact-spring 39 of the counter 22.

It will be remembered that a car was left in the single-track section tray'eling toward the right and that therefore the counter 22 had been rotated one point away from its zero-point. The bridge 37 and the insulated disk 36 are therefore not in contact with the springs 38 and 39, and a contact is not made between these springs. Consequently the circuit is not completed through the motor 20 of the signal 18 and the signal remains at danger. If the car which is traveling to the right passes over the track-circuit 3, the counter 22 is rotated one space toward the left in the manner already explained. This brings the counter 22 back to zero, and the circuit between the springs 38 and 39 is made. The current now flows from the wire 62 to the contact-spring 39 and across the bridge 37 to the contact-spring 38, to the wire 63, and to the circuit-closer on the signal 17. This signal being at danger, a circuit is made between the springs -11 and 4:3 and the current flows on through the wire 61 to the contact-point #10 of the counter 21. This contact is already made, because we left a car standing in the track-circuit 2. Current then flows through the wires 65, 66, and to the opposite side of the battery 60, thus making the circuit complete, causing the motor 20 to act, whereupon the signal 18 is pulled to clear and the car proceeds. \Vhen the car leaves the section 2, the circuit through relay 6 is broken, the contact 11 is broken, and in consequence the signal 18 returns to the danger position. The second car traveling to the left and entering the section 2 would cause the same circuits to be made and the counter 21 to be retated one more space to the right. It is evident now that the signal 17 cannot be placed in the clear position to allow the car to pass it into the single-track. section until the counter 21 has been rotated back to zero. A car passing over the track-section at will complete the circuit through the relay 8 and close the circuit at the contact-point 16. Currentwill therefore flow from the battery 12, through the contact-point 16 and wire 68, to the magnet 21 of the counter 21, then to wire 66 and to the opposite side of the battery 12, making a complete circuit, attracting the armature of the magnet 21, and rotating the counter 21 one space to the left, thus counting out the car. \Vhen the counter 21 is in the zero position, the signal 17 can be cleared, and only then.

It will be noticed that in order to clear a signal for a car to proceed over the single track, first, the counter belonging to that signal must be in the zero position; second. the signal guarding the opposite end of the block must be in the danger position, and, third, the counter controlling the latter signal must have moved one space forward. Only when all of these conditions are fulfilled can the signal allowing a car to enter a block be cleared.

It may be mentioned that stop mechanism is provided for the insulated disk 36, so that the electromagnet 21 (or 26) cannot rotate the disk any farther to the left than to the zero position. The number of notches by which the disk may be rotated in each direction or the number of cars winch may be admitted to the block depends only upon the number of teeth in the ratchet-wheels 33 and 34. An arm 69, pivoted at 7 O on the frame, has dog ends which engage with the ratchet-wheels 33 and 34, respectively, and said dog is operated by the impact of the arms 32 and engaging with the ratchet-wheels prevents overthrow.

It is clear that if a signal should stick at danger the circuit-controller, composed of the springs 43 and 44 and the plug 45, would at this point continue the motor-circuit of the other signal, and the latter motor circuit would continue to be made, and therefore controlled by the two counters, one at the normal or zero position and the other in the moved position, making the contact at 40. In other words, the circuit-controller at the signal can be omitted. So, too, if one counter should stick in the normal position the motor-circuit would be made, and therefore controlled, by the operated position of the other counter and by the position of the circuit-controller at the other signal. In other words, one counter may be cut out, and the control of the motor-circuits by one counter and by a circuit at a signal is an operative combination, and therefore control by the circuitcontroller at the signal and by only one counter is a part of this invention. Further, a magnet, such as 23 or 25, with an armature, such as 27 or 29, and a contact, such as 40, is a circuit-closer which may obviously be separated from the counter and the functions of the apparatus would continue, provided the contact is in the motor-circuit and the magnet is controlled by a track instrument. This invention, whether operated electrically or otherwise, comprises these and other modifications of the apparatus hereinabove described, and shown in the drawings, and within the scope of the following claims.

l/Vhat I claim is 1. In a railway signaling apparatus, a block, a motor-signal at each end of the block, a counter related to each signal for counting cars entering and leaving the block, a circuit for each motor, apparatus therein in both counting devices for automatically controlling the motor, and track instruments at opposite ends of the block for controlling each counter, substantially as described.

2. In a railway signaling apparatus, a block, amotor-signal at each end of the block, a counter related to each signal for counting cars entering and leaving the block, a circuit for each motor, apparatus therein in both counting devices for automatically controlling the motor by one position of one counting device and by another positionof the other counting device, and track instruments at opposite ends of the block for controlling each counter, substantially as described.

3. In arailway signaling apparatus, a block, a motor-signal at each end of the block, a motor-circuit for each signal, a counter related to the signal in each motor-circuit for counting cars entering and leaving the block, apparatus in each motor-circuit in both counting devices for automatically controlling the motor, and track instruments at opposite ends of the block for controlling each counter, substantially as described.

4. In a railway signaling apparatus, a block, a motor-signal at each end of the block,'a m0- tor-circuit for each signal, a counter related to the signal in each motor-circuit for counting cars entering and leaving the block, apparatus in each motor-circuit in both counting devices for automatically controlling the motor-circuit by one position of one counter and by another position of the other counter, and track instruments at opposite ends of the block for controlling each counter, substantially as described.

5. In a railway signalingapparatus, a block, a motor-signal at each end of the block, a motor-circuit for each signal, a counter related to each signal for counting cars entering and leaving the block, track instruments at opposite ends of the block for controlling each counter, and means in said motor-circuit in both counters for closing the motor-circuit of one signal by the normal position of its own counting device and by operation of the other counting device, substantially as described.

6. Ina railway signaling apparatus, a block, a motor-signal at each end of the block, a motor-circuit for each signal, a counter related to each signal for counting cars entering and leaving the block, track instruments at opposite ends of the block for controlling each counter, and apparatus in each motor-circuit in both counting devices for closing the motor-circuit of one signal by the normal position of its own counting device and by operation of the other counting device, and means for opening each motor-circuit by the resetting of its own counting device to the unoperated position, substantially as described.

7. In a railway signaling apparatus, a block, a motor-signal at each end of the block, a motor-controller for each signal, a counter related to each signal for counting cars entering and leaving the block, a motor-circuit for each motor-signal, apparatus in each circuit in both counters for automatically controlling the motor by one counting device and by the position of said circuit-controller, and track instruments at opposite ends of the block for controlling each counter, substantially as described.

8. In a railway signaling apparatus, a block, a motor-signal at each end of the block, a motor-controller for each signal, a counter related to each signal for counting cars entering and leaving the block, a motor-circuit for each motor-signal, apparatus in each circuit in both counting devices for automatically controlling the motor by the counting position of one counting device and by the position of said circuit-controller, and track instruments at opposite ends of the block for controlling each counter, substantially as described.

9. In a railway signaling apparatus,a block, a motor-signal at each end of the block, a circuit-controller for each motor-signal, a motorcircuit tor each signal. a counter related to the signal in each motor-circuit for counting cars entering and leaving the block, apparatus in each motor-circuit in both counters for automatically controlling the motor-circuit by one counting device and by the circuitcontroller of the other signal, and track instruments at opposite ends of the block for controlling each counter, substantially as described.

10. ln a railway signaling apparatus, a block, a motor-signal at each end of the block, a circuit-controller for each motor-signal, a motor-circuit for each signal, a counter related to the signal in each motor-circuit for counting cars entering and leaving the block, apparatus in each motor-circuit in both counters for automatically controlling the motorcircuit by the counting position of one counter and by the position of the circuit-controller of the other signal, and track instruments at opposite ends of the block for controlling each counter, substantially as described.

11. ln a railway signaling apparatus, a block, a motor-signal at each end of the block, a circuit-controller for each motor-signal, a motor-circuit for each signal, a counter related to the signal in each motor-circuit for counting cars entering and leaving the block, track instruments at opposite ends of the block for controlling each counter, and apparatus in each motor-circuit in both counters for closing the motor-circuit of one signal by the normal position of its own counting device and by operation of the circuit-controller of the other signal, substantially as described.

12. in a railway signaling apparatus, a block, a motor-signal at each end of the block, a circuit-controller for each motor-signal, a motor-circuit for each signal, a counter related to the signal in each motor-circuit for counting cars entering and leaving the block, track instruments at opposite ends of the block for controlling each counter, and apparatus in each motor-circuit in both counters for closing the motor-circuit of one signal by the normal position of its own counting device and by operation of the circuit-controller of the other signal, and means for opening said motor-circuit by the resetting of its own counting device to the normal position.

13. In a railway signaling apparatus, a

block, a motor-signal at each end of the block, a circuit-controller for each signal, a counter related to each signal for counting cars entering and leaving the block, apparatus for each motor-signal in both counters for automatically controlling the motor-signal by both counting devices, means for simultaneously controlling one motor-signal by the position of the circuit-controller of the other signal, and track instruments at opposite ends of the block for controlling each counter.

1%. In a railway signaling apparatus, a block, a motor-signal at each end of the block, a motor-controller for each sigual,a counter related to each signal for counting cars entering and leaving the block, apparatus for each motor-signal in both counters for automatically controlling the motor by one position of one counting device and by another position of the other counting device and by the position of its motor-controller simultaneously, and track instruments at opposite ends of the block for controlling each counter. Y

15. In a railway signaling apparatus, a block, a motor-signal at each end of the block, a circuit-controller for each motor-signal, a motor-circuit for each motor-signal, a counter related to each signal for counting cars entering and leaving the block, apparatus in said motor-circuit in both counters for automatically controlling the motor-circuit by both counting devices and by one of said circuit-controllers simultaneously, and track instruments at opposite ends of the block for controlling each counter.

16. In a railway signaling apparatus, a blocl ,a motor-signal at each end of the block, a circuit-controller for each signal, a counter related to each signal for counting cars enter ing and leaving the block, apparatus in said motor-circuit in both counters for automatically controlling either motor-circuit by one position of one counter and by another position of the other counter and by the position of the circuit-controller of the signal in the other circuit simultaneously, and track instruments at opposite ends of the block for controlling each counter, substantially as described.

IT. in a railway signaling apparatus, a block, a motor-signal at each end of the block, a circuit-controller for each motor, a motorcircuit for each signal, a counter related to each signal for counting cars entering and leaving the block, track instruments at opposite ends of the block for controlling each counter, and means for closing the motor-circuit of one signal by the normal position of its own counting device and by operation of the other counting device and by the normal position of the circuit-controller of the other signal simultaneously, substantially as described.

18. In a railway signaling apparatus, a block, a motor-signal at each end of the block, a circuit-controller for each motor-signal, a motor-circuit for each signal, a counter related to each signal for counting cars entering and leaving the block, track instruments at opposite ends of the block for controlling each counter, the motor-circuit of each signal comprising means for closing said motor-circuit by the normal position of its own counting device and by operation of the other counting l device and by the normal position of the circuit-controller of the other signal simultaneously, and means for opening said motor-circuit by the resetting of its own counting device to the normal position.

19. In a railway signaling apparatus, a block, a motor-signal at each end of the block, a circuit-controller for each signal, a motorcircuit for each signal, a counter related to each signal for counting cars entering and leaving the block, track instruments at opposite ends of the block for controlling each counter, and apparatus for operating the signal at one end of the block under the following combined conditions: first; that the counter relating to said signal is in the normal position; and second, that the counter controlling the signal at the opposite end of the block has been operated by operation of one of said track instruments relating to the signal to be operated.

20. In a railway signaling apparatus, a block, a motor-signal at each end of the block, a circuit-controller for each signal, a motorcircuit for each signal, a counter related to each signal for counting cars entering and leaving the block, track instruments at opposite ends of the block for controlling each counter, and means for operating the signal at one end of the block under the following combined conditions: first; that the counter relating to that signal is in the normal position; second, that the signal for the opposite end of the block is at danger; and third, that the counter controlling the latter signal has been operated by the actuation of a track instrument at the end first mentioned of the block.

21. In a railway signaling apparatus, a block, a motor-signal at each end of the block, a motor-circuit for each signal, a counter related to each signal for counting cars entering and leaving the block, a normally open make and break in each motor-circuit controlled by a magnet, and a normally closed make and break in each motor-circuit controlled by a counter.

22. In a railway signaling apparatus, a block, a motor-signal at each end of the block, a motor-circuit for each signal, a counter related to each signal for counting cars entering and leaving the block, a normally open make and break in each motorcircuit controlled by a magnet, a normally closed make and break in each motorcircuit controlled by a counter, and track instruments at opposite ends of the block for controlling each counter.

23. In a railway signaling apparatus, a block, a motor-signal at each end of the block,

a circuit-controller for each signal, a motor- I circuit for each signal, a counter related to each signal for counting cars entering and leaving the block, contacts in each motorcircuit controlled by the counter at the adjacent signal, and a normally open contact in each motorcircuit controlled by a magnet at the distant signal.

24:. In a railway signaling apparatus, a block, a motor-signal at each end of the block, a circuit-controller for each signal, a motorcircuit for each signal, a counter related to each signal for counting cars entering and leaving the block, contacts in each motor-circuit controlled by the counter at the adjacent signal, and a normally open contact in each motor-circuit controlled by an operating-magnet of the counter at the distant signal.

25. A counting mechanism for railway signaling apparatus consisting of two electromagnets, a movable armature-arm .having a spring end for each electromagnet, a shaft, two ratchet-wheels on said shaft having oppositely-directed teeth, one for each arm, a disk of insulated material on said shaft carrying a peripheral bridge-piece of conducting material and having peripheral indentations and stationary contact-pieces adapted to rest in said indentations and simultaneously to make contact with said bridge, substantially as described.

26. A counting mechanism for railway signaling apparatus consisting of two electromagnets, a shaft, two ratchet-Wheels on said shaft having oppositely-directed teeth, a movable armature-arm for each electromagnet, each adapted to engage one of said ratchetwheels, and an arm adapted to be struck by each armature-arm adapted to engage the said ratchet-wheels to prevent overthrow thereof.

27. A counting mechanism for railway signaling apparatus consisting of two electromagnets 23, 24, a movable armature-arm 27, 28 for each electromagnet and having a spring end 32, a shaft 35, two ratchet-wheels 33, 34 on said shaft having oppositely-directed teeth and adapted to be engaged by said armaturearms, respectively, an insulated disk 36 upon said shaft having the peripheral bridge-piece 37, the stationary contact-pieces 38, 39 resting on the periphery of said disk and adapted to make contact simultaneously with said piece '37, the double escapement pawl 69 adapted to be struck and moved by each armature-arm 27,28 and to engage said ratchetwheels, respectively, for preventing overthrow thereof, and the electrical contact 40 adapted to be made by the armature-arm 27, which latter arm is adapted to carry current and to be insulated except when in contact with the contact 40.

- FRANK L. DODGSON. l/Vitnesses:

D. GURNEE, l. BUTLER. 

